Process of making salol.



mthn STATES I truce.

PATEN'r PROCESS OF MAKING SALOL.

SPECIFICATION forming part of Letters Patent No. 642,218, dated January30, 1900.

Application filed May 22, 1899. Serial No. 717,838. (No specimens.)

T0 (all whom it may concern.-

Be it known that I, HENRY CARL FEHRLIN, doctor of philosophy, a citizenof the United States, residing at Milwaukee, in the county of Milwaukeeand State of Wisconsin, have invented certain new and usefulImprovements in Processes of Manufacturing Salol, of which the followingis a full, clear, and em act description, which will enable othersskilled in the art to which it appertains to use the same.

IIeretofore salol has been produced by treating mixtures of salicylicacid and phenol or neutral and basic salts of the acid and phenol orphenolate of soda with phosphorus oxychlorid, carbonyl chlorid, or othersimilarly-acting reagents, as described in Letters Patent No. 350,012,dated the 28th day of September, 1886, to Marcel V011 Nencki; No.377,311, dated the 31st day of January, 1888, to Carl Kolbe; No.383,306, dated the 22d day of May, 1888, also to Carl Kolbe; No.391,248, dated the 16th day of October, 1888, to Panajota W. Hofman, andalso No. 622,456, dated the 4th day of April, 1899, issued to myself.

I have now discovered that salol can also be advantageously producedfrom salts of acid-phenyl-carbonic ether by subjecting the same to theaction of POCl or 0001 or one of the other similarly-acting reagents.The salol is then formed according to the following equations:

In order to carry out my process, I first produce salts of saidacid-phe11yl-carbonic ether-for instance, phenyl-sodium carbonate C HOCONaO-diy subjecting perfectly dry phenolate of soda in autoclaves tothe action of carbonic acid, substantially as described in LettersPatent No. 334,290, granted to End. Schmitt. I then treat the product atan ordinary temperature With COC] or other similarly-acting reagents, asPOCl until satisfactory conversion of the sodiumphenyl carbonate intosalol is effected, which reaction takes place under a spontaneous production of heat. The product thus obtained is washed with a solution ofsoda and then the salol distilled off in a current of steam, wherebysaid salol is obtained as a colorless product, which can be furtherpurified by crystallization from alcohol.

I do not claim anything disclosed in the patents referred to; but

What I claim as new in my present application, and desire to secure byLetters Patent, 1s-

1. The within-described process of produc ing salol from alcaline andearthy alcaliue salts of acid-phenyl-carbonic ether, by the action ofphosphorus oxychlorid.

2. The within-described process of producing salol from sodiuin-phenylcarbonate by subjecting the same to the action of phosphorus oxychloriduntil satisfactory conversion of the sodium-phenyl carbonate into salolis effected, subsequently treating the product with a solution of soda,and finally, distilling oft the salol in a current of steam.

In testimony whereof I affix my signature in presence of two witnesses.

HENRY CARL FEHRLIN.

\Vitnesses:

F. B. HUOHTING, J. E. HUOHTING.

